// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2020 Rockchip Electronics Co. Ltd.
 *
 * Author: Zorro Liu <zorro.liu@rock-chips.com>
 */

#ifndef __EBC_DEV_H__
#define __EBC_DEV_H__

#include <linux/notifier.h>

/*
 * max support panel size 2232x1680
 * ebc module display buf use 4bit per pixel
 * eink module display buf use 8bit per pixel
 * ebc module direct mode display buf use 2bit per pixel
 */
#define EBC_FB_SIZE 0x200000    /* 2M */
#define EINK_FB_SIZE 0x400000   /* 4M */
#define DIRECT_FB_SIZE 0x100000 /* 1M */

#define MAX_FB_NUM 4

#define EBC_SUCCESS (0)
#define EBC_ERROR (-1)

/*
 * ebc status notify
 */
#define EBC_OFF (0)
#define EBC_ON (1)
#define EBC_FB_BLANK (2)
#define EBC_FB_UNBLANK (3)

/*
 * ebc system ioctl command
 */
#define EBC_GET_BUFFER (0x7000)
#define EBC_SEND_BUFFER (0x7001)
#define EBC_GET_BUFFER_INFO (0x7002)
#define EBC_SET_FULL_MODE_NUM (0x7003)
#define EBC_ENABLE_OVERLAY (0x7004)
#define EBC_DISABLE_OVERLAY (0x7005)
#define EBC_GET_OSD_BUFFER (0x7006)
#define EBC_SEND_OSD_BUFFER (0x7007)

/*
 * IMPORTANT: Those values is corresponding to android hardware program,
 * so *FORBID* to changes bellow values, unless you know what you're doing.
 * And if you want to add new refresh modes, please appended to the tail.
 */
enum panel_refresh_mode {
    EPD_AUTO = 0,
    EPD_OVERLAY = 1,
    EPD_FULL_GC16 = 2,
    EPD_FULL_GL16 = 3,
    EPD_FULL_GLR16 = 4,
    EPD_FULL_GLD16 = 5,
    EPD_FULL_GCC16 = 6,
    EPD_PART_GC16 = 7,
    EPD_PART_GL16 = 8,
    EPD_PART_GLR16 = 9,
    EPD_PART_GLD16 = 10,
    EPD_PART_GCC16 = 11,
    EPD_A2 = 12,
    EPD_DU = 13,
    EPD_RESET = 14,
    EPD_SUSPEND = 15,
    EPD_RESUME = 16,
    EPD_POWER_OFF = 17,
    EPD_PART_EINK = 18,
    EPD_FULL_EINK = 19,
};

/*
 * IMPORTANT: android hardware use struct, so *FORBID* to changes this, unless you know what you're doing.
 */
struct ebc_buf_info {
    int offset;
    int epd_mode;
    int height;
    int width;
    int panel_color;
    int win_x1;
    int win_y1;
    int win_x2;
    int win_y2;
    int width_mm;
    int height_mm;
};

#if IS_ENABLED(CONFIG_ROCKCHIP_EBC_DEV)
int ebc_register_notifier(struct notifier_block *nb);
int ebc_unregister_notifier(struct notifier_block *nb);
int ebc_notify(unsigned long event);
#else
static inline int ebc_register_notifier(struct notifier_block *nb)
{
    return 0;
}

static inline int ebc_unregister_notifier(struct notifier_block *nb)
{
    return 0;
}

static inline int ebc_notify(unsigned long event)
{
    return 0;
}
#endif

#endif
